CN114057392A - Preparation method of silicate neodymium glass - Google Patents

Preparation method of silicate neodymium glass Download PDF

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CN114057392A
CN114057392A CN202010772019.3A CN202010772019A CN114057392A CN 114057392 A CN114057392 A CN 114057392A CN 202010772019 A CN202010772019 A CN 202010772019A CN 114057392 A CN114057392 A CN 114057392A
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glass
raw materials
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倪国强
朱淑蓉
田思默
田维坚
姚婷婷
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Hangzhou Kangming Photoelectric Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/102—Glass compositions containing silica with 40% to 90% silica, by weight containing lead
    • C03C3/108—Glass compositions containing silica with 40% to 90% silica, by weight containing lead containing boron
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B1/00—Preparing the batches
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B19/00—Other methods of shaping glass
    • C03B19/02—Other methods of shaping glass by casting molten glass, e.g. injection moulding
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B25/00—Annealing glass products
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/18—Stirring devices; Homogenisation
    • C03B5/187—Stirring devices; Homogenisation with moving elements
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/235—Heating the glass
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C4/00—Compositions for glass with special properties
    • C03C4/02—Compositions for glass with special properties for coloured glass
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C4/00—Compositions for glass with special properties
    • C03C4/08—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths

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  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
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Abstract

The invention discloses a preparation method of silicate neodymium glass, which comprises the following steps: preparing and weighing raw materials according to production requirements; putting the weighed raw materials into an automatic mixer for mixing; after the raw materials are mixed, pouring the completely mixed raw materials into an air-electric furnace for heating and stirring for 14-18 hours to prepare glass liquid; cooling the glass liquid which is completely stirred, pouring the glass liquid into a high-temperature-resistant mold, and then transferring the glass liquid into an annealing furnace for cooling; and taking out the glass cooled to the normal temperature, and detecting a finished product. A method for preparing silicate neodymium glass can prepare glass which can absorb spectrum in different regions, reduce the transmittance of blue light, absorb yellow light and orange light, has good chemical stability, can be produced in large batch, can produce glass with different thicknesses and reduces the production cost of high-quality glass.

Description

Preparation method of silicate neodymium glass
Technical Field
The invention relates to the field of optical glass, in particular to a preparation method of silicate neodymium glass.
Background
In the recent years, the eye health of teenagers is more and more important for the eye health in both families and society, and except for glasses, lamps and lanterns and the like have eye protection requirements of different degrees. Ultraviolet rays, short-wave blue light, yellow light, orange light and the like in light rays have great damage to eyes and are irreversible, so that the glass capable of absorbing the ultraviolet rays, the short-wave blue light, the yellow light and the orange light is very important to be used in other products such as glasses, lamps and the like. The production process of the common glass is mature and suitable for batch production, but the glass cannot realize interval absorption spectrum, and particularly cannot realize the separation of ultraviolet rays and orange light. The existing dilute phosphoric acid laser neodymium glass has specific spectral characteristics, namely interval absorption spectrum, but the laser glass has extremely high cost both in material and preparation method, and is poor in chemical stability, large in stress change and expansion coefficient due to the fact that the laser glass is easy to absorb water, more suitable for one-time use, high in production process requirement and not suitable for mass production.
Disclosure of Invention
In view of the above defects in the prior art, the technical problem to be solved by the present invention is to solve the problems that the ordinary glass cannot realize the interval absorption spectrum, and the glass with the interval absorption spectrum function has high cost and is easy to absorb water to cause poor chemical stability. Therefore, the invention provides a preparation method of silicate neodymium glass, which can prepare glass with the functions of interval absorption spectrum, blue light transmittance reduction, yellow light and orange light absorption, ultraviolet ray cutoff, difficult water absorption, good chemical stability, small stress change and small expansion coefficient, can be produced in large batch, can produce glass with different thicknesses, reduces the production cost of high-quality glass, and applies high-quality neodymium glass to civil use.
In order to achieve the purpose, the invention provides a preparation method of silicate neodymium glass, which comprises the following steps:
preparing and weighing raw materials according to production requirements;
putting the weighed raw materials into an automatic mixer for mixing;
after the raw materials are mixed, pouring the completely mixed raw materials into an air-electric furnace for heating and stirring for 14-18 hours to prepare glass liquid;
cooling the glass liquid which is completely stirred, pouring the glass liquid into a high-temperature-resistant mold, and then transferring the glass liquid into an annealing furnace for cooling;
and taking out the glass cooled to the normal temperature, and detecting a finished product.
Further, preparing and weighing raw materials according to production requirements specifically comprises:
respectively weighing the large material and the auxiliary material for preparing the glass, so as to prevent the raw materials from being polluted;
and respectively weighing the large materials and the auxiliary materials, and then respectively pouring the weighed large materials and the auxiliary materials into an automatic mixer.
Further, the raw materials that will weigh are thrown into automatic blendor and are mixed, specifically include:
respectively pouring the large materials and the auxiliary materials into an automatic mixer, and starting the automatic mixer;
the rotating speed of the automatic mixer is controlled by frequency conversion, and the automatic mixer rotates for 60 minutes at the rotating speed of 0-60 rpm to complete the mixing process.
Further, the rotation speed of the automatic mixer is controlled by frequency conversion, and the automatic mixer rotates for 60 minutes at the rotation speed of 0-60 rpm to complete the mixing process, and the method specifically comprises the following steps:
the automatic mixer was rotated at a speed of 10 rpm for 5 minutes, then at a speed of 20 rpm for 10 minutes, then at a speed of 40 rpm for 10 minutes, then at a speed of 60 rpm for 10 minutes, then at a speed of 40 rpm for 10 minutes, then at a speed of 20 rpm for 10 minutes, and then at a speed of 10 rpm for 5 minutes, thereby completing complete uniform mixing of the raw materials.
Further, after the raw materials are mixed, pouring the completely mixed raw materials into an electric gas furnace for heating and stirring for 14-18 hours to prepare glass liquid, which specifically comprises the following steps:
preheating a gas electric furnace, wherein the preheating temperature is 1550 +/-30 ℃, and the preheating time is 6 hours;
reducing the temperature of the preheated gas-electric furnace to 1400 +/-30 ℃;
putting the completely mixed raw materials into a gas-electric furnace in a thin-layer feeding mode, keeping the temperature of 1400 +/-30 ℃ for 9-10 hours after all the completely mixed raw materials are put into the gas-electric furnace, and then raising the temperature of the gas-electric furnace to 1440 ℃;
and a stirring paddle is arranged above the center of the gas electric furnace, and the glass liquid is formed by rotationally stirring in a manner of first shallow, then deep, then shallow and then deep, and then slowly, then quickly and slowly.
Further, sampling was performed 3 to 5 times at the liquid level of the glass liquid during the stirring.
Further, the stirred glass liquid is cooled to 1100 ℃ and 1150 ℃ at a cooling rate of 100 ℃ per hour.
And further pouring the cooled molten glass into a high-temperature-resistant grinding tool, wherein the slurry stopping direction in the gas-electric furnace is consistent with the pouring direction during pouring.
Further, the glass liquid which is completely stirred is cooled and poured into a high-temperature-resistant mold, then the glass liquid is transferred into an annealing furnace for cooling, the temperature is firstly reduced to 520 ℃, heat preservation is carried out for 48 hours, and then the temperature of the glass liquid in the mold is reduced at the rate of reducing 3 ℃ per hour until the temperature is normal.
Furthermore, the main material comprises a main material of silicate system, the auxiliary material comprises praseodymium-neodymium, the proportion of praseodymium-neodymium and the main material is set to be 0.1-0.5:1, the silicate-series main material comprises the following components: SiO 22；Na2O；K2O；B2O3；ZnO；PbO；Sb2O3
Calculated by mass percent, the method comprises the following steps:
Figure BDA0002616999570000021
Figure BDA0002616999570000031
technical effects
1. The existing dilute phosphate system is changed into a silicate system, so that the plasma exchange is easier to realize, the water absorption of the silicate system is weakened, the chemical stability is enhanced, the stress change is small, and the expansion coefficient is small;
2. the neodymium glass has the function of interval absorption spectrum, the visible blue light transmittance is about 80%, the harmful blue light transmittance is 75%, and the beneficial blue light transmittance is 85%; the visible yellow light transmittance is about 30 percent, and the orange light transmittance is about 0.6 percent;
3. the production cost and the production difficulty are reduced, the mass production can be realized, the glass with different thicknesses can be produced according to the requirements, the glass is applied to the civil market, and the application range is wider.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is a schematic diagram of the spectral absorption of a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating the temperature variation of the gas-electric furnace according to a preferred embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating the variation of the rotation speed of the stirring blade in the gas electric furnace according to the preferred embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
The embodiment provides a preparation method of silicate neodymium glass, which comprises a silicate main material and praseodymium-neodymium, wherein the proportion of the praseodymium-neodymium and the main material is set to be 0.1-0.5: 100. The praseodymium-neodymium glass is used as a colorant and a functional auxiliary material, so that the glass can absorb visible light in different regions, the glass has the effects of preventing dizziness and effectively blocking orange light and yellow light, and the glaucoma can be effectively dealt with. The main material of silicate system and praseodymium-neodymium can avoid the phenomenon of crystallization in the process of manufacturing glass, and the stability of the glass is enhanced.
The silicate neodymium glass of the embodiment adopts silicate main materials, which include: SiO 22；Na2O；K2O；B2O3；ZnO；PbO；Sb2O3. Calculated by mol percentage, comprises the following components:
Figure BDA0002616999570000032
Figure BDA0002616999570000041
SiO2as a glass body, SiO2Has a high melting point of SiO2When the content of (A) is too high, the melting point is high, so that the temperature requirement in the preparation process is high, the production cost is increased, and K2The source of O is mainly from KNO3And K2CO3Adding KNO into the main material3And K2CO3As a combustion-supporting substance, while lowering the melting point of the main material, but KNO3And K2CO3When the amount of (B) is too large, the melting point of the main material is too low, thereby affecting the stability of the glass, and thus, KNO3And K2CO3Is set to 1.05-1.17, SiO2And K2The mass ratio of O is 3.80 to 7.13, preferably 5.34.
The composition and experimental data of a silicate-based neodymium glass according to the present invention will be described below by way of specific examples.
TABLE 1 composition and experimental data for a silicate-based neodymium glass according to the first embodiment of the present invention
Component (%) Number 1 Number 2 No. 3 Number 4 Number 5
SiO2 50.45 52.78 54.05 56.95 58.25
Na2O 9.45 10.88 10.13 9.16 9.91
K2O 13.29 11.14 10.13 7.99 9.06
B2O3 1.99 2.08 2.13 2.06 1.98
ZnO 4.98 5.21 5.33 5.21 3.74
PbO 19.15 17.18 17.48 17.84 16.25
Sb2O3 0.70 0.73 0.75 0.79 0.81
Total of 100 100 100 100 100
Praseodymium neodymium 0.5 0.5 0.5 0.5 0.5
Transmittance (average) of 380nm-500nm 80％ 80％ 80％ 80％ 80％
Transmittance (average) of 524nm to 534nm 29％ 29％ 30％ 30％ 29％
Transmittance (average) of 570-594 nm 0.6％ 0.5％ 0.6％ 0.5％ 0.5％
DA(grade) 2 2 2 2 2
Dw(grade) 1 1 1 1 1
Coefficient of linear expansion (1 x 10)-7/℃) 90 90 90 90 90
In the above embodiment, DAFor acid resistance, DWThe lower the rating for water resistance, acid resistance and water resistance, the higher the chemical stability of the glass. The thickness of the glass finished product in the above embodiment is 2cm +/-0.5, and the refractive index nd is 1.52-1.57, and preferably nd is 1.537.
As shown in fig. 1, the portion on the outer side of the curve (upward) is a portion where light is intercepted, and the portion on the inner side of the curve (downward) is a portion where light is transmitted. In example 3 of the present invention, the transmittance for light of 380nm to 500nm was 70 to 90%, the transmittance for light of 524nm to 534nm was 29.2 to 37.6%, and the transmittance for light of 570nm to 594nm was 0.6 to 7%.
As shown in fig. 1, in the visible light range (380nm-760nm), the transmittance of the glass of the embodiment of the present invention is divided, and particularly, when light with wavelength ranges of 524 nm-534 nm and 570 nm-594 nm stimulates human eyes and easily dazzles (for example, when driving at night), the glass of the embodiment of the present invention can prevent the light with the wavelength ranges from damaging the human eyes after blocking the light with the wavelength ranges.
Example two
In this embodiment, on the basis of the first embodiment, one CeO is added2The proportion of the main material and the praseodymium-neodymium of the auxiliary material is consistent, other experimental data are also basically consistent, and the details are not repeated here. CeO (CeO)2The addition of (A) can make the glass have the function of blocking ultraviolet rays, and in the preparation process of the glass, CeO2The glass can be decolored and clarified by using the decolorant. CeO (CeO)2The proportion of the main materials is as follows: 0.1-0.2: 100. when CeO is present2The proportion of the main materials is as follows: at a ratio of 0.1:100, can block ultraviolet rays with a wavelength of 200-2The proportion of the main material is 0.2: 100, the ultraviolet ray with the wavelength of 200-385nm can be blocked, so as to avoid the damage of the ultraviolet ray to the human body, especially the eyes.
EXAMPLE III
The embodiment provides a preparation method of silicate neodymium glass in the first embodiment, which includes the following steps:
step 100, preparing and weighing raw materials according to production requirements;
step 200, putting the weighed raw materials into an automatic mixer for mixing;
step 300, after the raw materials are mixed, pouring the completely mixed raw materials into an electric gas furnace for heating and stirring for 14-18 hours to prepare glass liquid;
step 400, cooling the glass liquid which is completely stirred, pouring the glass liquid into a high-temperature-resistant mold, and then transferring the glass liquid into an annealing furnace for cooling;
and 500, taking out the glass cooled to the normal temperature, and detecting a finished product.
In the following examples, the total amount of the raw materials was 1750 kg, and the capacity of the gas-electric furnace was 600L.
Step 100, preparing and weighing raw materials according to production requirements, specifically comprising:
step 101, respectively weighing a large material and an auxiliary material for preparing glass to prevent raw material pollution;
and step 102, respectively weighing the large materials and the auxiliary materials, and then respectively pouring the weighed large materials and the auxiliary materials into an automatic mixer.
The metering weighing requires the loss of the part to be taken into account. When the required raw materials exceed the maximum bearing range of the automatic mixer, all the raw materials are uniformly divided and then sequentially mixed. Preferably, in this embodiment, all the raw materials are divided into 4 parts and sequentially mixed by 2 automatic mixers. In addition, the principle of the raw materials selected before weighing is that the raw materials are firstly put in first-out and then used for preparation, namely, the raw materials put in storage are firstly used, and then the raw materials are taken to prepare the raw materials when the glass is prepared, so that the freshness of the raw materials and the stability of the performance are ensured.
Wherein, step 200, throw into automatic blendor with the raw materials that have weighed and mix, specifically include:
step 201, after the large materials and the auxiliary materials are respectively poured into an automatic mixer, starting the automatic mixer;
and step 202, controlling the rotating speed of the automatic mixer in a variable frequency mode, and rotating for 60 minutes at the rotating speed of 0-60 rpm to finish the material mixing process. The frequency conversion control of the present embodiment is described with a specific example, which specifically includes:
the automatic mixer was rotated at a speed of 10 rpm for 5 minutes, then at a speed of 20 rpm for 10 minutes, then at a speed of 40 rpm for 10 minutes, then at a speed of 60 rpm for 10 minutes, then at a speed of 40 rpm for 10 minutes, then at a speed of 20 rpm for 10 minutes, and then at a speed of 10 rpm for 5 minutes, thereby completing complete uniform mixing of the raw materials.
In addition, the automatic mixer in this embodiment is self-control mixer, and automatic mixer includes upper and lower two parts, and upper portion is the lid, and the lower part is for holding the material device, and when upper portion and lower part mutually sealed cooperation form a cylinder, is rotary motion under the drive of motor.
Further, as shown in fig. 2, step 300, after the raw materials are mixed, the completely mixed raw materials are poured into an air-electric furnace to be heated and stirred for 14-18 hours, and the glass liquid is prepared, which specifically comprises:
step 301, preheating a gas electric furnace, wherein the preheating temperature is 1550 +/-30 ℃, and the preheating time is 6 hours; the gas-electric furnace needs to be heated to 1550 +/-30 ℃ in advance, the compactness of the gas-electric furnace can be enhanced by heating in advance, the temperature is reduced to 1440 +/-30 ℃ before the mixed raw materials are put into the furnace, the gas-electric furnace uses natural gas, the required temperature can be reached, and the gas-electric furnace is more environment-friendly;
step 302, reducing the temperature of the preheated gas-electric furnace to 1400 +/-30 ℃;
step 303, putting the completely mixed raw materials into a gas-electric furnace in a thin layer feeding mode, and keeping the temperature of 1400 +/-30 ℃ for 9-10 hours after all the completely mixed raw materials are put into the gas-electric furnace; then the temperature of the gas-electric furnace is increased to 1440 +/-30 ℃;
and 304, mounting a stirring paddle above the center of the gas electric furnace, and rotationally stirring in a manner of first shallow, then deep, then shallow, then deep, and then slow, then fast and then slow to form molten glass (the temperature during stirring is kept at 1440 +/-10 ℃).
The thin layer feeding mode is characterized in that a small amount of materials are fed in a mode of slowing down the speed for multiple times, the traditional one-hour feeding mode is changed into one-hour feeding mode for 4-5 times, when the fed mixed raw materials are laid on a thin layer in a gas-electric furnace and then stand still, and then are poured in, raw materials need to be prevented from being accumulated in the process, the thin layer feeding mode can reduce unnecessary loss of the raw materials (such as excessive reaction of the raw materials at high temperature and the like), and the thin layer feeding mode is a crucial step for preparing glass with stable performance.
It should be noted that, after the raw materials are divided into 4 parts and mixed in sequence, the raw materials are fed according to the first-in first-out principle, that is, the raw materials which are completely mixed first are fed into the gas-electric furnace in a thin layer feeding manner, and the temperature of 1440 ± 30 ℃ is always kept in the gas-electric furnace in the process of waiting for feeding.
Step 304, mounting a stirring paddle above the center of the gas electric furnace, rotationally stirring in a manner of first shallow, then deep, then shallow, then deep, and then slow, then fast, then slow, to form molten glass, as shown in fig. 3, the specific process is as follows:
after the paddle is arranged, the stirring paddle is firstly arranged at the liquid level, the liquid level is stirred for 0.5 hour at the rotating speed of 30 revolutions per hour, so that the liquid level generates chemical reaction and a large amount of gas is discharged, then the stirring paddle is placed to the bottom (slowly lowered while rotating, and kept rotating after being placed to the bottom end), the stirring paddle is rotated and stirred for 6 hours at the rotating speed of 60 revolutions per hour, then sampling on the liquid surface, lifting the paddle to the position 5cm below the liquid surface according to the sampling condition, rotationally stirring for 2 hours at the rotating speed of 30 revolutions per hour, then the stirring paddle is put down, the stirring is carried out for about 3 hours at the rotating speed of 50 revolutions per hour, then the operation is ended, and simultaneously the rotating speed of the stirring paddle is reduced, the temperature is reduced in a mode of not burning the furnace and exhausting air from a flue, so that the temperature is suddenly reduced at a speed of 100 ℃ per hour, and during the period, the temperature is tested and detected by a 5-point method, and the temperature difference of a hearth and the furnace pressure are monitored.
The stirring paddle used in the stirring process is extruded and formed by a self-made mould, and agate is required to polish the lens, so that the stirring paddle is compact, free of impurities, air holes and fine cracks, and the container and the stirring paddle are ensured not to generate texture, bubbles, stones and impurity inclusions on the glass liquid.
During the stirring process, sampling is carried out for 3-5 times on the liquid level of the glass liquid. The sampling sequence is that the middle is first and the two sides are last, and the transmissivity, the refracting index and the bubble of sample all need to be detected after sampling every time to whether the stirring process has the abnormal conditions.
When the stirring is stopped at the end, attention needs to be paid to pouring the cooled molten glass to the high-temperature-resistant grinding tool, and the slurry stopping direction in the gas-electric furnace is consistent with the pouring direction during pouring.
Step 400, cooling the glass liquid which is completely stirred, pouring the glass liquid into a high-temperature-resistant mold, and then transferring the glass liquid into an annealing furnace for cooling; the method specifically comprises the following steps: and cooling the glass liquid which is completely stirred, pouring the glass liquid into a high-temperature-resistant mold, then transferring the glass liquid into an annealing furnace for cooling, firstly reducing the temperature to 520 +/-3 ℃, preserving the heat for 48 hours, and then reducing the temperature of the glass liquid in the mold at a rate of reducing the temperature by 3 ℃ per hour until the temperature is normal. According to the difference of weather, the time that the cooling needs also is different, especially when the weather is hotter, after the temperature drops to 80 ℃, need to bed at 4 angles of mould and rise, do benefit to its cooling, 4 angles of bed hedgehopping need to bed at the same time, prevent that glass from appearing the damage in the cooling process.
The glass prepared by the preparation method of silicate neodymium glass provided by the embodiment of the invention has stable performance, good effects of difficult water absorption and acid resistance, and better performance than that of the existing neodymium glass, and meanwhile, the preparation method has the advantages of low manufacturing cost and high yield, can be used for civil use, is especially used for eye protection products, is especially suitable for desert, seaside, mountain and other areas with low ozone layer content and strong direct sunlight, and can reduce the damage of light to human bodies.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims (10)

1. A preparation method of silicate neodymium glass is characterized by comprising the following steps:
preparing and weighing raw materials according to production requirements;
putting the weighed raw materials into an automatic mixer for mixing;
after the raw materials are mixed, pouring the completely mixed raw materials into an air-electric furnace for heating and stirring for 14-18 hours to prepare glass liquid;
cooling the glass liquid which is completely stirred, pouring the glass liquid into a high-temperature-resistant mold, and then transferring the glass liquid into an annealing furnace for cooling;
and taking out the glass cooled to the normal temperature, and detecting a finished product.
2. The method of claim 1, wherein the preparing and weighing of the raw materials according to the production requirements comprises:
respectively weighing the large material and the auxiliary material for preparing the glass, so as to prevent the raw materials from being polluted;
and respectively weighing the large materials and the auxiliary materials, and then respectively pouring the weighed large materials and the auxiliary materials into the automatic mixer.
3. The method of claim 2, wherein the mixing of the weighed raw materials in an automatic mixer comprises:
respectively pouring the large materials and the auxiliary materials into an automatic mixer, and starting the automatic mixer;
the rotating speed of the automatic mixer is controlled by frequency conversion, and the automatic mixer rotates for 60 minutes at the rotating speed of 0-60 rpm to complete the mixing process.
4. The method for preparing silicate neodymium glass according to claim 3, wherein the rotation speed of the automatic mixer is controlled by frequency conversion, and the mixer is rotated at a rotation speed of 0-60 rpm for 60 minutes to complete the mixing process, and the method specifically comprises the following steps:
the automatic mixer is rotated at a speed of 10 rpm for 5 minutes, then at a speed of 20 rpm for 10 minutes, then at a speed of 40 rpm for 10 minutes, then at a speed of 60 rpm for 10 minutes, then at a speed of 40 rpm for 10 minutes, then at a speed of 20 rpm for 10 minutes, and then at a speed of 10 rpm for 5 minutes, thereby completing the complete uniform mixing of the raw materials.
5. The method for preparing neodymium silicate glass according to claim 2, wherein after the raw materials are mixed, the completely mixed raw materials are poured into an electric gas furnace to be heated and stirred for 14-18 hours to prepare the glass liquid, and the method specifically comprises the following steps:
preheating a gas electric furnace, wherein the preheating temperature is 1550 +/-30 ℃, and the preheating time is 6 hours;
reducing the temperature of the preheated gas-electric furnace to 1400 +/-30 ℃;
feeding the completely mixed raw materials into the gas-electric furnace in a thin layer feeding mode, keeping the temperature of 1400 +/-30 ℃ for 9-10 hours after all the completely mixed raw materials are fed into the gas-electric furnace, and then raising the temperature of the gas-electric furnace to 1440 ℃;
and a stirring paddle is arranged above the center of the gas electric furnace, and the glass liquid is formed by rotationally stirring in a manner of first shallow, then deep, then shallow and then deep, and then slowly, then quickly and slowly.
6. The method according to claim 5, wherein the sampling is performed 3 to 5 times at the surface of the molten glass during the stirring.
7. The method according to claim 5, wherein the stirred glass melt is cooled to 1100-1150 ℃ at a cooling rate of 100 ℃ per hour.
8. The method according to claim 7, wherein the cooled molten glass is poured into a refractory grinding tool, and the slurry-stopping direction in the gas-electric furnace is the same as the pouring direction.
9. The method according to claim 2, wherein the glass melt after being completely stirred is cooled and poured into a high temperature-resistant mold, and then the glass melt is cooled in an annealing furnace, wherein the temperature is first reduced to 520 ± 3 ℃ for 48 hours, and then the temperature of the glass melt in the mold is reduced at a rate of 3 ℃ per hour until the glass melt is at room temperature.
10. The method for preparing neodymium glass of silicate system according to claim 1, wherein the raw materials include a main material and an auxiliary material, the main material includes a main material of silicate system, the auxiliary material includes praseodymium neodymium, and the proportion of praseodymium neodymium and the main material is set to be 0.1-0.5:100, the silicate-series main material comprises the following components: SiO 22；Na2O；K2O；B2O3；ZnO；PbO；Sb2O3
Calculated by mass percent, the method comprises the following steps:
Figure FDA0002616999560000021
CN202010772019.3A 2020-08-04 2020-08-04 Preparation method of silicate neodymium glass Pending CN114057392A (en)

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